文献类型：期刊文献

英文题名：Ni-Mn bi-metal oxide catalysts for the low temperature SCR removal of NO with NH3

作者：Wan, Yaping[1];Zhao, Wenru[1];Tang, Yu[1];Li, Liang[1];Wang, Huijun[1];Cui, Yunlong[1];Gu, Jinlou[1];Li, Yongsheng[1];Shi, Jianlin[1,2]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Low Dimens Mat Chem Lab, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

年份：2014

卷号：148

起止页码：114

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20134717009557);WOS:【SCI-EXPANDED(收录号:WOS:000332431500013)】；

基金：This study was financially supported by the National Key Basic Research Program of China (973 Program) (Grant No. 2013CB933200), the National Natural Science Foundation of China (Grant Nos. 21001043, 21073059 and 51372084), the Fundamental Research Funds for the Central Universities (222201313010) and the Nano-Special Foundation for Shanghai Committee of Science and Technology (12nm0502600).

语种：英文

外文关键词：Low temperature NO-SCR; Nickel and manganese mixed oxides; Surface Mn4+ active species; Lewis acid sites

摘要：A series of nickel-manganese bi-metal oxide catalysts of different Ni/Mn ratios were prepared by a co-precipitation method for the low temperature selective catalytic reduction (SCR) of NO with NH3 in the presence of excess O-2. The NO conversion over different catalysts decreased in the following sequence of Ni(0.4)-MnOx > MnOx >> Ni(1)-MnOx > Ni(2.5)-MnOx > NiOx. The Ni(0.4)-MnOx catalyst showed the highest catalytic activity, 85% of NO conversion at 95 degrees C and 100% from 120 to 240 degrees C, among the catalysts investigated. The TPR, XPS, NH3-TPD and in situ FTIR results revealed that Mn4+ was the main active species for SCR reaction and the addition of nickel species enhanced the surface concentration and acidity of Lewis acid sites. A possible synergetic catalytic effect was proposed for the low temperature SCR reaction through the electron transfer between Mn and Ni ions. (C) 2013 Elsevier B.V. All rights reserved.